labyrinthulid noun1 •Any protist in the order Labyrinthulales (syn. Labyrinthulida), the slime nets, which produce a network of filaments or tubes inside of which the cells move and from which they obtain nutrients.The detritivores thraustochytrids and labyrinthulids have been associated with 22:5ɷ6 and 22:4ɷ6. — 2015 formslabyrinthulids